Transmission-clutch-disk-drum puller



May 19, 1925.

MERDIAN TRANSMISSION CLUTCH DISK DRUM FULLER Filed May 27, 1924 if it IPatented May 19, 1925.

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' TRANSMISSION-CLUECH -DISK-DBUM PULLEB.

Application filed May 27,

To all whom, it may concern:

Be it known that T, FRED MERDIAN, a citizen of the United States,residing at Vancouver, in the county of Clarke and State of Washington,have invented certain new and useful Improvements in Transmission-Clutch-Disk-Drum Pullers, of which the following is a specification,reference being had to the accompanying drawings.

This invention relates to devices for pulling parts mounted upon a shaftoff of the shaft, and particularly to a disk drum puller designed forpulling transmission clutch disk drums from. the shaft in the repairingof Ford automobiles.

In Ford automobiles the transmission clutch disk drum is mounted on ashaft and keyed into position, and this transmission clutch disk drum isdisposed within the clutch disks, which are in turn disposed within. thebrake drum. This leaves but very little room to get at this disk drumwhen it is desired to remove it. For the purpose of removal, the drum isformed with two holes in its periphery intended to be engaged by pins ona pulling device and the screw in the head of the pulling device presseson the end of the shaft as the screw is forced inward, thus drawing thedisk drum off the shaft. A puller of somewhat diiferent design isdistributed by the manufacturer of the Ford machines for use inperforming this operation, which puller has a single arm on each side,the hole in the disk drum being threaded. In placing this puller'inposition, it is necessary that the pin be screwed through the threadedhole and thus into engagement in the hole in the drum. This is difiicultwork because of the lack of room and takes considerable time to effectthe properengagement between the pins and the drum. After the pins areengaged, how ever, there being but one arm to the device, the pull isnot direct but slightly sidewise and, therefore, thestrain on the arm,if the drum happens to be tight, is such that the pins are continuallypulling out and the arms being sprung or broken.

The object of my invention is to provide a very simple, readily operatedand effective device of this character in which there is a central bodywith longitudinally extending arms, the central body having a screwadapted to bear against the shaft and the arms which extend parallel tosaid screw being cleft or slotted at their extremities so as to embrace"the edge of the drum. Extending across these slotted arms are pinswhich are adapted to be passed through the holes in the drums. Thusthere are no parts which have to be threaded in to the drum and thestrain is equal on both arms and on opposite points of the drum so thatthere 1s no tendency of the device to place a sidewise pull upon thedisk drum and there is no tendency of the pin to break.

Myinvention is illustrated in the accompanying drawing, wherein Figure 1is a transverse sectional view through a disk drum and through my drumpuller;

Figure 2 is a perspective view of the puller.

Referring to this drawing, 10 designates a body formed with thelongitudinally extending, approximately parallel arms 11. The middleportion of this body is enlarged, as at 12, to form a more or lesscylindrical portion but this portion has a screw-threaded bore 13through which the screw 14 passes, this screw being pointed at one endand at its outer end provided with a head whereby it may be readily ofthe arms are longitudinally slotted, as at 15. The arms 11 are boredtransversely to the length of the slots 15 for the passage rotated. Theextremities of pins 16, these pins being smooth and provided with heads1?, the shanks of the pins being formed attheir extremities wlth cotterpin passages 18 if desired. v

In the use of this device, the slot in each arm 12 enables each arm tostraddle the edge of the drum and then the unthreaded pins 16 may beslipped through the bores 15 and through the holein the drum A. Then thescrew 1 1 is turned in and the pull comes straight on the two edges ofthe slot and onthe two ends of the pin on each side of the rim of thedisk, thus doing away entirely with any tendency to break the pin orwith any sidewise pull and doing away with the labor involved in gettinga threaded pin in position.

1. A puller for disk drums comprising a U-shaped body to provideparallel arms, the arms at their extremities being lon itudinallyslotted, the slots extending to tie ends of the arms and the ends of thearms being transversely apertured, pins adapted to pass through theapertures, and a centrally disposed screw extending parallel to the armsand between the same.

2. A disk drum puller of the character describe-d comprising a bodybeing U-shaped in form to provide parallel arms, the extremities of thearms being longitudinally slotted, the slots extending to the ends ofthe arms and the extremities of the arms being transversely apertured,unthreaded pins passing through said apertures and having heads at theirouter ends and at their inner ends being apertured for the pas- 15 Intestimony whereof I hereunto aflix my 2 signature.

FRED MERDIAN.

